EP0857552A2 - Stone cutting element with increased wear resistance - Google Patents

Stone cutting element with increased wear resistance Download PDF

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Publication number
EP0857552A2
EP0857552A2 EP98200161A EP98200161A EP0857552A2 EP 0857552 A2 EP0857552 A2 EP 0857552A2 EP 98200161 A EP98200161 A EP 98200161A EP 98200161 A EP98200161 A EP 98200161A EP 0857552 A2 EP0857552 A2 EP 0857552A2
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EP
European Patent Office
Prior art keywords
processing tool
gate zone
stone processing
tool according
diamond
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP98200161A
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German (de)
French (fr)
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EP0857552A3 (en
EP0857552B1 (en
Inventor
Herbert Prantl
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Tyrolit-Schleifmittelwerke Swarovski KG
Tyrolit Schleifmittelwerke
Original Assignee
Tyrolit-Schleifmittelwerke Swarovski KG
Tyrolit Schleifmittelwerke
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Publication of EP0857552A3 publication Critical patent/EP0857552A3/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/14—Zonally-graded wheels; Composite wheels comprising different abrasives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/34—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/04—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs
    • B28D1/041—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs with cylinder saws, e.g. trepanning; saw cylinders, e.g. having their cutting rim equipped with abrasive particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/12—Saw-blades or saw-discs specially adapted for working stone

Definitions

  • the invention relates to a stone machining tool with sintered metal-bonded, preferably multi-layered diamond containing cutting material assembled abrasive elements, for example for core drilling.
  • EP 0 15 6762 B1 describes only a gradual achievement in this regard the full sleekness over the entire contact area between the roof segment and workpiece and is satisfied with the rapid formation of the linear Touch to ensure tool guidance or centering of the hollow drill on the stone material.
  • This object is achieved by a in the feed direction Stone working tool seen on the outside of the abrasive elements trained gate zone, which has a different composition with increased Has wear compared to the regular main part of the abrasive elements.
  • This different structure can be achieved through filling measures in the sintered metal bond the gate zone with the grinding technology itself with high-performance abrasives known fillers such as tungsten disulfide, tungsten carbide, Molybdenum disulphide, coal grit, corundum, silicon carbide, lime, glass, by cutting or more brittle diamond grain, by cutting grain concentration reduction and / or through different, softer-tuned binding compositions can be achieved.
  • the combination of 2 or more measures is favorable, the difference in construction and thus wear in accordance with the invention the regular main part and the cut zone of the abrasive elements bring about.
  • Fig. 1 shows an embodiment of the invention in the form of a hollow drill with sintered metal Abrasive elements.
  • the abrasive elements (1) are as roof segments executed.
  • the gate zone (3) follows the roof-shaped contour of the Abrasive element (1).
  • the thickness of the gate zone (3) has been shown in tests proved to be cheapest if they were about the average grain diameter of the in the Gate zone (3) corresponds to diamond grain (5) used.
  • the abrasive elements (1) are on the carrier body by soldering, welding or sintering (6) of the tool attached.
  • Fig. 2 shows a metallurgical cut, made in the plane according to Cut (7) of an abrasive element (1).
  • the gate zone (3) is in the sense the invention adjusted more wear by adding copper-tin-bronze with 92 weight percent copper and 8 weight percent tin as a percentage of 11.5 volume percent for pure cobalt binding according to regular part (4).
  • the gate zone (3) with molybdenum disulfide in a percentage of 3.8 volume percent, with an average grain size of 3.5 my to achieve the provided drilling properties according to the invention.
  • FIGS. 3 and 4 each represent a graphical test report with a Comparison of one improved according to the invention and one after the prior art stone working tool in the following Conditions:
  • Fig. 4 shows the different feed speeds with an inventive Hollow drill (11) and with a standard hollow drill (10) Reinforced concrete in the area of steel reinforcement.
  • the drilling with the invention with an unsharpened subscription zone (3) equipped hollow drill initially took place at a reduced feed rate (11) the feed rate (10) with a sharpened standard hollow drill. After about 0.5 m of drilling, a reversal took place in the test example according to FIG the feed rate values up to the end of the drilling test stopped after 2.8 m drilling.
  • Fig. 3 shows in principle similar course of the experiment as shown in Fig. 4, only with slightly less difference between the feed speed achievable according to the invention (9) and standard feed rate (8) because of the concrete no steel reinforcement contained.
  • the idea of the invention is not limited to that described above Embodiment, but also extends to embodiments not shown of stone working tools.
  • the benefit of the invention can always get particularly with such stone working tools if the proportion of the contact area between stone working tool and workpiece on the total working surface of the abrasive stone processing tool is high, for example when deep-cutting with circular saws, for milling, hollow drilling, frame saws and the like.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Drilling Tools (AREA)

Abstract

In a stone working (e.g. core drilling) tool with multilayer abrasive elements consisting of sintered metal-bonded cutting material, preferably diamond, each abrasive element (1) has a leading initial cutting zone (3) with a different composition and increased wear compared with the regular portion (4) of the element. Preferably, the initial cutting zone (3) contains a wear promoting filler selected from tungsten disulphide, tungsten carbide, molybdenum disulphide, lime, corundum, silicon carbide, carbon particles, glass, ceramic and pore formers. It contains more fragile and easily worn diamond particles, has a lower concentration of diamond particles and/or has a binder with lower hardness and/or wear resistance, compared with the regular portion (4) of the abrasive element.

Description

Die Erfindung bezieht sich auf ein Steinbearbeilungswerkzeug mit sintermetallgebundenen, vorzugsweise Diamant als Schneidstoff enthaltenden, mehrschichtig aufgebauten Abrasivelementen beispielsweise zum Kernbohren.The invention relates to a stone machining tool with sintered metal-bonded, preferably multi-layered diamond containing cutting material assembled abrasive elements, for example for core drilling.

Bei allen metallisch gebundenen Steinbearbeitungswerkzeugen, wie auch bei Hohlbohrern gibt es die bekannte Anschnitt- bzw. Anbohrproblematik. Die Metallbindungen sind so hart, daß sie die teuren Diamantkörner - sinngemäß - wirksam festhalten und während des Ersteinsatzes des Werkzeuges vor dem Angriff durch das schleifschlammhaltige Kühlmedium schützen.With all metal-bound stone processing tools, as with Hollow drills have the well-known gating or tapping problem. The metal bonds are so hard that the expensive diamond grains - effectively - are effective hold on and during the first use of the tool before the attack protect with the cooling medium containing grinding sludge.

Die Patentschrift EP 0 156 762 B1 befaßt sich mit dieser Anbohrproblematik. Es gibt verschiedene Maßnahmen, die Anschnittschwierigkeiten zu überwinden, wie zum Beispiel

  • 1. Ausbildung der Abrasivelemente als Dachsegmente, wobei nur eine schmale "First"-Region des Schneidelements zum Erstkontakt mit dem Werkstoff gelangt,
  • 2. Aufschärfen beim Hersteller des Werkzeuges durch eigene Finishvorgänge vor der Auslieferung, wie Abschleifen der überflüssigen Bindung mit gezielt aufgebauten Schleifkörpern wie keramisch weich gebundene Schleifscheiben, aber auch gewisse geeignete Natursteinmaterialien und elastisch polymergebundene Schleifkörper.
    • Patent specification EP 0 156 762 B1 deals with this problem of drilling. There are various measures to overcome the bleeding difficulties, such as
  • 1. formation of the abrasive elements as roof segments, only a narrow "first" region of the cutting element making initial contact with the material,
  • 2. Sharpening at the manufacturer of the tool through its own finishing processes before delivery, such as grinding the superfluous bond with specifically designed grinding wheels such as ceramic-soft-bonded grinding wheels, but also certain suitable natural stone materials and elastically polymer-bonded grinding wheels.

    • Zusätzliche Arbeitsgänge vor Auslieferung sind teuer und teilweise auch für die Kundschaft unakzeptabel, da solche Werkzeuge nicht mehr als neuwertig engestuft werden könnten.Additional operations before delivery are expensive and sometimes also for the Customers unacceptable because such tools are no longer classified as new could become.

    Die Dachform der Abrasivelemente von Hohlbohrern bewirkt sogar eine technische Irrtumsmöglichkeit, da man zwar die linienförmige Firstzone sieht mit ihrer geringen Kontaktfläche zum Werkstück im Erstkontakt, aber nicht beim Fortschreiten des Anarbeitens die gegenüber einem geraden Abrasivelement entsprechend dem Neigungswinkel vergrößerte Gesamtkontaktfläche zwischen Werkzeug und Werkstück. Ein Dachsegment allein, das nicht durch zusätzliche Aufschärfvorgänge vorbereitet ist, erzeugt daher den gegenteiligen Effekt, der eigentlich erwünscht ist, nämlich eine längerdauernde Anarbeitsphase.The roof shape of the abrasive elements of hollow drills even creates a technical one Mistake, since you can see the linear ridge zone with its small contact area to the workpiece in the first contact, but not when advancing of processing corresponding to a straight abrasive element the total contact area between the angle of inclination Tool and workpiece. One roof segment alone, not by additional ones Sharpening processes is prepared, therefore produces the opposite effect that actually a longer period of preparation is desirable.

    Die EP 0 15 6762 B1 beschreibt zu diesem Sachverhalt nur ein allmähliches Erreichen der vollen Schnittigkeit über die gesamte Kontaktfläche zwischen Dachsegment und Werkstück und begnügt sich mit der raschen Ausbildung der linienförmigen Berührung zur Sicherstellung der Werkzeugführung bzw. Zentrierung des Hohlbohrers am Steinwerkstoff.EP 0 15 6762 B1 describes only a gradual achievement in this regard the full sleekness over the entire contact area between the roof segment and workpiece and is satisfied with the rapid formation of the linear Touch to ensure tool guidance or centering of the hollow drill on the stone material.

    Aufgabe der Erfindung ist, einen Hohlbohrer der eingangs beschriebenen Art so zu verbessern, daß

  • sofortiges Zentrieren beim ersten Kontakt mit dem Werkstück sofortige optimale Schnittigkeit und
  • keinerlei Änderung dieser Schnittigkeitseigenschaften vom Anfang bis zum Ende der Werkzeugstandzeit
    • erreichbar ist.The object of the invention is to improve a hollow drill of the type described above in such a way that
  • immediate centering on first contact with the workpiece immediate optimal cutting and
  • no change in these cutting properties from the beginning to the end of the tool life
    • is achievable.

    Diese Aufgabe wird erfindungsgemäß gelöst durch eine in Vorschubrichtung des Steinbearbeitungswerkzeugs gesehen an der Außenseite der Abrasivelemente ausgebildete Anschnittzone, die eine unterschiedliche Zusammensetzung mit erhöhtem Verschleiß gegenüber dem regulären Hauptteil der Abrasivelemente aufweist. Dieser unterschiedliche Aufbau kann durch Füllmaßnahmen bei der Sintermetallbindung der Anschnittzone mit an sich aus der Schleiftechnik mit Hochleistungsschleifmitteln bekannten Füllstoffen wie Wolframdisulfid, Wolframkarbid, Molybdändisulfid, Kohlegrieß, Korund, Siliziumkarbid, Kalk, Glas, durch schnittgeres bzw. brüchigeres Diamantkorn, durch Schneidkornkonzentrationsverminderung und/oder durch unterschiedliche, weicher abgestimmte Bindungszusammensetzung erreicht werden. Die Schneidkornkonzentrationsverminderung kann auch gegen Konzentration = Null gehen, sodaß die verbleibende Schnittigkeit im Erstkontakt mit dem Werkstück hauptsächlich durch die gering e Abrasivität des Füllstoffes bzw. der Füllstoffe herbeigeführt wird.This object is achieved by a in the feed direction Stone working tool seen on the outside of the abrasive elements trained gate zone, which has a different composition with increased Has wear compared to the regular main part of the abrasive elements. This different structure can be achieved through filling measures in the sintered metal bond the gate zone with the grinding technology itself with high-performance abrasives known fillers such as tungsten disulfide, tungsten carbide, Molybdenum disulphide, coal grit, corundum, silicon carbide, lime, glass, by cutting or more brittle diamond grain, by cutting grain concentration reduction and / or through different, softer-tuned binding compositions can be achieved. The cutting grain concentration reduction can also go towards concentration = zero, so that the remaining sleekness in First contact with the workpiece mainly due to the low abrasiveness of the Filler or the fillers is brought about.

    In Versuchen hat sich für die Anschnittzone insbesonders eine Sintermetallbindung mit feinkörnigem, fein verteiltem Molybdändisulfid-Füllstoff als im Sinne der Erfindung als zielführend erwiesen. In tests, a sintered metal bond has been found in particular for the gate zone with fine-grained, finely divided molybdenum disulfide filler than in the sense of Invention proven to be effective.

    Im Sinne der Erfindung günstig ist die Kombination von 2 oder mehr Maßnahmen, um den erfindungsgemäßen Unterschied im Aufbau und damit im Verschleiß des regulären Hauptteils und der Anschnittzone der Abrasivelemente herbeizuführen.In the sense of the invention, the combination of 2 or more measures is favorable, the difference in construction and thus wear in accordance with the invention the regular main part and the cut zone of the abrasive elements bring about.

    Nachfolgend wird die Erfindung anhand der Zeichnung, des zugehörigen Schliffbildes eines Ausführungsbeispiels und von Versuchsergebnissen beschrieben. Es zeigen:

  • Fig. 1 die Prinzipskizze eines erfindungsgemäßen Steinbearbeitungswerkzeuges,
  • Fig. 2 das metallkundliche Schliffbild eines erfindungsgemäßen Abrasivelementes,
  • Fig. 3 ein Vergleichsschaubild Vorschubgeschwindigkeit - Bohrweg auf quarzhaltigem Beton und
  • Fig. 4 ein Vergleichsschaubild Vorschubgeschwindigkeit - Bohrweg auf quarzhaltigem Stahlbeton mit 0,8 Volumsprozent Stahlanteil.
    • The invention is described below on the basis of the drawing, the associated micrograph of an exemplary embodiment and test results. Show it:
  • 1 is a schematic diagram of a stone processing tool according to the invention,
  • 2 shows the micrographic micrograph of an abrasive element according to the invention,
  • Fig. 3 is a comparison chart of feed rate - drilling path on quartz-containing concrete and
  • Fig. 4 is a comparison diagram of feed rate - drilling path on quartz-containing reinforced concrete with 0.8 volume percent steel.

    • Fig. 1 zeigt eine Ausführung der Erfindung in Form eines Hohlbohrers mit sintermetallgebundenen Abrasivelementen. Die Abrasivelemente (1) sind als Dachsegmente ausgeführt. Die Anschnittzone (3) folgt der dachförmigen Kontur des Abrasivelementes (1). Die Dicke der Anschnittzone (3) hat sich in Versuchen als günstigste erwiesen, wenn sie etwa dem mittleren Korndurchmesser des in der Anschnittzone (3) zur Verwendung gelangenden Diamantkorns (5) entspricht. Die Abrasivelemente (1) sind durch Löten, Schweißen oder Sintern am Trägerkörper (6) des Werkzeugs befestigt.Fig. 1 shows an embodiment of the invention in the form of a hollow drill with sintered metal Abrasive elements. The abrasive elements (1) are as roof segments executed. The gate zone (3) follows the roof-shaped contour of the Abrasive element (1). The thickness of the gate zone (3) has been shown in tests proved to be cheapest if they were about the average grain diameter of the in the Gate zone (3) corresponds to diamond grain (5) used. The abrasive elements (1) are on the carrier body by soldering, welding or sintering (6) of the tool attached.

    Fig. 2 zeigt einen metallkundlichen Schliff, angefertigt in der Ebene gemäß Schnittführung (7) eines Abrasivelements (1). Die Anschnittzone (3) ist im Sinne der Erfindung verschleißender eingestellt durch Zugabe von Kupfer-Zinn-Bronze mit 92 Gewichtsprozent Kupfer und 8 Gewichtsprozent Zinn im Prozentsatz von 11,5 Volumsprozent zur reinen Kobaltbindung gemäß regulärem Teil (4). Zusätzlich ist die Anschnittzone (3) mit Molybdändisulfid im Prozentsatz von 3,8 Volumsprozent, mit einer Korngröße von durchschnittlich 3,5 my zur Erreichung der erfindungsgemäßen Anbohreigenschaften versehen.Fig. 2 shows a metallurgical cut, made in the plane according to Cut (7) of an abrasive element (1). The gate zone (3) is in the sense the invention adjusted more wear by adding copper-tin-bronze with 92 weight percent copper and 8 weight percent tin as a percentage of 11.5 volume percent for pure cobalt binding according to regular part (4). In addition is the gate zone (3) with molybdenum disulfide in a percentage of 3.8 volume percent, with an average grain size of 3.5 my to achieve the provided drilling properties according to the invention.

    Fig. 3 und Fig. 4 stellen einen graphischen Versuchsbericht dar jeweils mit einer Gegenüberstellung von einem erfindungsgemäß verbesserten und einem nach dem Stand der Technik hergestellten Steinbearbeitungswerkzeug bei folgenden Bedingungen:FIGS. 3 and 4 each represent a graphical test report with a Comparison of one improved according to the invention and one after the prior art stone working tool in the following Conditions:

    NaßbohrenWet drilling

    Werkzeug:Tool:
    152 x 400 x 1 1/4" Kobaltbindung
    24 - 4 - 8,5    152 x 400 x 1 1/4 "cobalt binding
    24 - 4 - 8.5
    Maschine:Machine:
    Bohrständer HS CY-S / Bohrmotor Weka DK 22
    P = 2,3 kW
    n = 320 min-1
    vs = 2,5 m/s    Drill stand HS CY-S / drill motor Weka DK 22
    P = 2.3 kW
    n = 320 min -1
    v s = 2.5 m / s
    Material:Material:
    Fig 3: Beton mit Quarzzuschlägen
    Fig. 4: Beton mit Quarzzuschlägen
    Armierungsanteil 0,8 Volumsprozent    Fig 3: Concrete with quartz aggregates
    Fig. 4: Concrete with quartz aggregates
    Reinforcement share 0.8 percent by volume
    Einsatzbedingungen:Conditions of use:
    vertikale Bohrungen zu je 35 cm Tiefevertical holes, each 35 cm deep

    Bei Versuchseinsätzen von erfindungsgemäßen Hohlbohrern entsprechend Fig. 3 und Fig. 4 hat sich neben dem beabsichtigten selbsttätigen, raschen Öffnen der Kontaktfläche der Abrasivelemente in der Anschnittzone (3) ein überraschender Effekt gezeigt. Durch Bemessung der Schichtdicke der Anschnittzone (3) unter Berücksichtigung der verwendeten mittleren Diamantkorngröße, kann der weitere Verschleißfortschritt bis zum Aufbrauch des Werkzeugs in einer bisher noch nicht bekannten Weise positiv beeinflußt werden. In der Anwendungspraxis derartiger Werkzeuge muß stets ein Kompromiß zwischen Wirkhärte des Abrasivelements und Dauerhaftigkeit und Bohrfortschrittsgeschwindigkeit (8, 9, 10, 11) des Werkzeugs gefunden werden. Dabei unterliegt das Werkzeug natürlich anwendungsbedingten Schwankungen. Insbesondere stellt Art und Anteil des Armierungsstahls in Beton eine kaum beeinflußbare Planungsgröße bei der Festlegung der Werkzeugspezifikation dar. Das Auftreffen auf nennenswerte Stahlanteile ist in der Praxis mit Verminderung des Bohrfortschritts verbunden. Eine Ursache für diese Schwierigkeiten ist die zumeist nicht von Anfang an optimal vorbereitete, geöffnete Kontaktfläche des Abrasivelements (1) mit dem Werkstück.In test operations of hollow drills according to the invention corresponding to Fig. 3 and Fig. 4 next to the intended automatic, quick opening the contact surface of the abrasive elements in the gate zone (3) is a surprising one Effect shown. By dimensioning the layer thickness of the gate zone (3) below Taking into account the average diamond grain size used, the further wear progress until the tool is used up in a previously are not yet positively influenced. In application practice Such tools must always be a compromise between the hardness of the abrasive element and durability and drilling progress speed (8, 9, 10, 11) of the tool can be found. The tool is of course subject to application Fluctuations. In particular, the type and proportion of the reinforcing steel in concrete a planning variable that can hardly be influenced when determining the tool specification. The impact on significant steel parts is associated in practice with a reduction in drilling progress. A Cause for these difficulties, the mostly not optimally prepared from the beginning, open contact surface of the abrasive element (1) with the workpiece.

    Die erfindungsgemäße Verwendung einer Anschnittzone (3) stellt nunmehr eine Möglichkeit zur Verfügung, von Anfang an optimale Schnittigkeitseigenschaften bisher nicht gekannten Ausmaßes herbeizuführen. Durch die Abstimmung der Schichtdicke der Anschnittzone entsprechend 0,3 bis 2 mal der mittleren Diamantkorngröße wird das Diamantkorn rasch freigelegt, aber in der hochfesten Einbindung durch die Bindung des regulären Teils (4) statistisch betrachtet noch in ausreichender Anzahl gehalten. So ist bei Auftreffen auf schwierigste Zerspanungsbedingungen das Steinbearbeitungswerkzeug von Anfang an vorbereitet und es stehen die Schneidkantender Diamantkörner mit ihrer natürlichen Schärfe fortwährend zur Verfügung, sodaß die genannten Schnittigkeitsverluste von Anfang an vermeidbar sind.The use according to the invention of a gate zone (3) now constitutes a Possibility available, optimal cutting properties from the start to bring about hitherto unknown dimensions. By voting the Layer thickness of the gate zone corresponding to 0.3 to 2 times the average diamond grain size the diamond grain is quickly exposed, but in the high-strength Integration through the binding of the regular part (4) is still statistically considered kept in sufficient numbers. This is the case when encountering the most difficult machining conditions prepared the stone processing tool from the start and there are the cutting edges of the diamond grains with their natural sharpness continuously available, so that the mentioned loss of cutting edge from the beginning are avoidable.

    Fig. 4 zeigt die unterschiedlichen Vorschubgeschwindigkeiten mit einem erfindungsgemäßen Hohlbohrer (11) und mit einem Standardhohlbohrer (10) auf Stahlbeton im Bereich der Stahlarmierung. Das Anbohren mit dem erfindungsgemäß mit einer ungeschärft verbliebenen Abohrzone (3) ausgestatteten Hohlbohrer erfolgte anfänglich noch mit verminderter Vorschubgeschwindigkeit (11) gegenüber der Vorschubgeschwindigkeit (10) mit geschärftem Standardhohlbohrer. Nach etwa 0,5 m Bohrstrecke erfolgte im Versuchsbeispiel nach Fig. 4 eine Umkehr der Vorschubgeschwindigkeitswerte, die bis zum Ende des Bohrversuchs nach 2,8 m Bohrstrecke anhielt.Fig. 4 shows the different feed speeds with an inventive Hollow drill (11) and with a standard hollow drill (10) Reinforced concrete in the area of steel reinforcement. The drilling with the invention with an unsharpened subscription zone (3) equipped hollow drill initially took place at a reduced feed rate (11) the feed rate (10) with a sharpened standard hollow drill. After about 0.5 m of drilling, a reversal took place in the test example according to FIG the feed rate values up to the end of the drilling test stopped after 2.8 m drilling.

    Fig. 3 zeigt prinzipiell ähnlichen Versuchsverlauf wie in Fig. 4 dargestellt, nur mit etwas geringerem Unterschied zwischen erfindungsgemäß erreichbarer Vorschubgeschwindigkeit (9) und Standard-Vorschubgeschwindigkeit (8), da der Beton keine Stahlarmierung enthielt.Fig. 3 shows in principle similar course of the experiment as shown in Fig. 4, only with slightly less difference between the feed speed achievable according to the invention (9) and standard feed rate (8) because of the concrete no steel reinforcement contained.

    In weiterer Folge des Werkzeugeinsatzes kann mit erfindungsgegenständlichen Steinbearbeitungswerkzeugen die Gleichmäßigkeit des für Abrasivprozesse notwendigen Verschleißfortschritts gewährleistet werden, was sich im sicheren, störungsfreien Betrieb der Anlage und erhöhter Standzeit des Werkzeuges ausdrückt. In a further consequence of the use of tools, the subject matter of the invention Stone processing tools the uniformity of what is necessary for abrasive processes Wear progress can be guaranteed, which is safe, trouble-free Operation of the system and increased tool life.

    Mit anders als nach der vorliegenden Erfindung hergestellten Steinbearbeitungswerkzeugen kann man dagegen mit einer ungünstigeren Beeinflussung der Schneideigenschaften des Werkzeuges durch den Erstkontakt mit dem Werkstück rechnen, welche aus dem weiteren Lebenszyklus des Werkzeuges nach dem Stand der Technik ohne Sondermaßnahmen nicht mehr verhindert werden kann.With stone working tools made differently from the present invention you can, however, with a less favorable influence on the Cutting properties of the tool through the first contact with the workpiece calculate which from the further life cycle of the tool the state of the art can no longer be prevented without special measures can.

    Der Erfindungsgedanke beschränkt sich nicht auf das vorstehend beschriebene Ausführungsbeispiel, sondern erstreckt sich auch auf nicht dargestellte Ausführungsbeispiele von Steinbearbeitungswerkzeugen. Der Nutzen der Erfindung kann immer bei solchen Steinbearbeitungswerkzeugen in besonderem Maße erhalten werden, wenn der Anteil der Kontaktfläche zwischen Steinbearbeitungswerkzeug und Werkstück an der Gesamtarbeitsfläche des abrasiven Steinbearbeitungswerkzeuges hoch ist wie beispielsweise beim Tiefschnitt mit Kreissägen, beim Fräsen, Hohlbohren, Gattersägen und dergleichen.The idea of the invention is not limited to that described above Embodiment, but also extends to embodiments not shown of stone working tools. The benefit of the invention can always get particularly with such stone working tools if the proportion of the contact area between stone working tool and workpiece on the total working surface of the abrasive stone processing tool is high, for example when deep-cutting with circular saws, for milling, hollow drilling, frame saws and the like.

    Liste der verwendeten Bezugszeichen:List of reference symbols used:

    11
    AbrasivelementAbrasive element
    22nd
    BohrrichtungDrilling direction
    33rd
    AnschnittzoneBleed zone
    44th
    regulärer Teilregular part
    55
    DiamantschneidkornDiamond cutting grain
    66
    TrägerkörperCarrier body
    77
    SchnittführungIncision
    88th
    Vorschubgeschwindigkeit StandardStandard feed rate
    99
    Vorschubgeschwindigkeit erfindungsgemäßFeed speed according to the invention
    1010th
    Vorschubgeschwindigkeit StandardStandard feed rate
    1111
    Vorschubgeschwindigkeit erfindungsgemäßFeed speed according to the invention

    Claims (8)

    Steinbearbeitungswerkzeug mit sintermetallgebundenen, vorzugsweise Diamant als Schneidstoff enthaltenden, mehrschichtig aufgebauten Abrasivelementen (1), beispielsweise zum Kernbohren, gekennzeichnet dadurch. daß die Abrasivelemente (1) des Steinbearbeitungswerkzeugs in Vorschubrichtung (2) gesehen eine Anschnittzone (3) mit unterschiedlicher Zusammensetzung und erhöhtem Verschleiß gegenüber dem regulären Teil (4) der Abrasivelemente (1) aufweisen.Stone working tool with sintered metal, preferably Multi-layer abrasive elements containing diamond as cutting material (1), for example for core drilling, characterized thereby. that the abrasive elements (1) of the stone processing tool in the feed direction (2) seen a gate zone (3) with different composition and increased wear compared to the regular part (4) of the abrasive elements (1). Steinbearbeitungswerkzeug nach Anspruch 1, gekennzeichnet dadurch, daß die Anschnittzone (3) mindestens einen verschleißfördernden Füllstoff aus der an sich bekannten Gruppe von Wolframdisulfid, Wolframkarbid, Molybdändisulfid, Kalk, Korund, Siliziumkarbid, Kohlegrieß, Glas, Keramik, Porenbildner enthält.Stone processing tool according to claim 1, characterized in that that the gate zone (3) has at least one wear-promoting filler from the known group of tungsten disulfide, tungsten carbide, Molybdenum disulfide, lime, corundum, silicon carbide, coal grit, glass, ceramics, Contains pore formers. Steinbearbeitungswerkzeug nach Anspruch 1, gekennzeichnet dadurch, daß die Anschnittzone (3) brüchigeres, leichter verschleißendes Diamantschneidkorn als der reguläre Teil (4) des Abrasivelementes (1) enthält.Stone processing tool according to claim 1, characterized in that that the gate zone (3) brittle, more easily wearing diamond cutting grain than the regular part (4) of the abrasive element (1) contains. Steinbearbeitungswerkzeug nach Anspruch 1, gekennzeichnet dadurch, daß die Anschnittzone (3) eine geringere Konzentration an Diamantschneidkorn enthält als der reguläre Teil (4) des Abrasivelementes (1).Stone processing tool according to claim 1, characterized in that that the gate zone (3) has a lower concentration of diamond cutting grain contains as the regular part (4) of the abrasive element (1). Steinbearbeitungswerkzeug nach Anspruch 1, gekennzeichnet dadurch, daß die Bindung der Anschnittzone (3) eine geringere Bindungshärte und/oder einen geringeren Verschleißwiderstand aufweist als die Bindung des regulären Teils (4) des Abrasivelementes (1). Stone processing tool according to claim 1, characterized in that that the bond of the gate zone (3) has a lower bond hardness and / or has a lower wear resistance than the binding of the regular part (4) of the abrasive element (1). Steinbearbeitungswerkzeug nach einem der Ansprüche 1 bis 5, gekennzeichnet dadurch, daß die Schichtdicke der Anschnittzone (3) in Abhängigkeit der mittleren Diamantkorngröße ausgeführt ist.Stone processing tool according to one of claims 1 to 5, characterized in that the layer thickness of the gate zone (3) is dependent the average diamond grain size. Steinbearbeitungswerkzeug nach Anspruch 6, gekennzeichnet dadurch, daß die Schichtdicke der Anschnittzone (3) 0,3-1,5 mal D ist, wobei D der mittlere Korndurchmesser des verwendeten Diamantschneidkorns ist.Stone processing tool according to claim 6, characterized in that that the layer thickness of the gate zone (3) is 0.3-1.5 times D, where D is the average grain diameter of the diamond cutting grain used. Steinbearbeitungswerkzeug nach Anspruch 4, gekennzeichnet dadurch, daß die Diamantschneidkornkonzentration in der Anschnittzone (3) Null ist.Stone processing tool according to claim 4, characterized in that that the diamond cutting grain concentration in the gate zone (3) is zero.
    EP98200161A 1997-01-27 1998-01-22 Stone machining tool with improved first cut behavior Expired - Lifetime EP0857552B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    AT109/97 1997-01-27
    AT10997 1997-01-27
    AT10997 1997-01-27

    Publications (3)

    Publication Number Publication Date
    EP0857552A2 true EP0857552A2 (en) 1998-08-12
    EP0857552A3 EP0857552A3 (en) 2000-02-09
    EP0857552B1 EP0857552B1 (en) 2000-10-25

    Family

    ID=3481760

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP98200161A Expired - Lifetime EP0857552B1 (en) 1997-01-27 1998-01-22 Stone machining tool with improved first cut behavior

    Country Status (4)

    Country Link
    EP (1) EP0857552B1 (en)
    AT (1) ATE197133T1 (en)
    DE (1) DE59800309D1 (en)
    ES (1) ES2154072T3 (en)

    Cited By (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE10005064A1 (en) * 2000-02-04 2001-08-23 Siegfried Goelz Gmbh & Co Sintered metal bonded segments with abrasive action are made up of segment modules with from front to back in direction of movement alternating concentrations of hard material particles
    EP1480781A1 (en) * 2002-02-08 2004-12-01 Ehwa Diamond Ind. Co., Ltd. Cutting tip for diamond tool and diamond tool
    EP1980346A1 (en) 2007-04-13 2008-10-15 Tyrolit Schleifmittelwerke Swarovski KG Core drill
    US10308559B2 (en) 2015-04-27 2019-06-04 Element Six (Uk) Limited Sintered polycrystalline cubic boron nitride body

    Families Citing this family (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US7373997B2 (en) 2005-02-18 2008-05-20 Smith International, Inc. Layered hardfacing, durable hardfacing for drill bits

    Citations (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP0156762A1 (en) * 1984-03-05 1985-10-02 HILTI Aktiengesellschaft Trepaning cutter
    US4681174A (en) * 1986-01-16 1987-07-21 Kazakhsky Politekhnichesky Institute Imeni V.I. Lenina Diamond crown bit
    EP0280835A1 (en) * 1987-03-02 1988-09-07 HILTI Aktiengesellschaft Hollow drill tool
    US4861350A (en) * 1985-08-22 1989-08-29 Cornelius Phaal Tool component

    Patent Citations (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP0156762A1 (en) * 1984-03-05 1985-10-02 HILTI Aktiengesellschaft Trepaning cutter
    US4861350A (en) * 1985-08-22 1989-08-29 Cornelius Phaal Tool component
    US4681174A (en) * 1986-01-16 1987-07-21 Kazakhsky Politekhnichesky Institute Imeni V.I. Lenina Diamond crown bit
    EP0280835A1 (en) * 1987-03-02 1988-09-07 HILTI Aktiengesellschaft Hollow drill tool

    Cited By (6)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE10005064A1 (en) * 2000-02-04 2001-08-23 Siegfried Goelz Gmbh & Co Sintered metal bonded segments with abrasive action are made up of segment modules with from front to back in direction of movement alternating concentrations of hard material particles
    US6712062B2 (en) 2000-02-04 2004-03-30 Siegfried Golz Gmbh & Co. Sintered metal bonded segments with an abrasive action, for tools
    EP1480781A1 (en) * 2002-02-08 2004-12-01 Ehwa Diamond Ind. Co., Ltd. Cutting tip for diamond tool and diamond tool
    EP1480781A4 (en) * 2002-02-08 2009-08-19 Ehwa Diamond Ind Co Ltd Cutting tip for diamond tool and diamond tool
    EP1980346A1 (en) 2007-04-13 2008-10-15 Tyrolit Schleifmittelwerke Swarovski KG Core drill
    US10308559B2 (en) 2015-04-27 2019-06-04 Element Six (Uk) Limited Sintered polycrystalline cubic boron nitride body

    Also Published As

    Publication number Publication date
    ES2154072T3 (en) 2001-03-16
    EP0857552A3 (en) 2000-02-09
    ATE197133T1 (en) 2000-11-15
    DE59800309D1 (en) 2000-11-30
    EP0857552B1 (en) 2000-10-25

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